<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>hello world</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<div style="text-align: center;margin:0 auto;width: 100%; ">
    hello world!
</div>
</body>
</html>